CN113023252B - Scraper conveyor - Google Patents

Scraper conveyor Download PDF

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Publication number
CN113023252B
CN113023252B CN202110437648.5A CN202110437648A CN113023252B CN 113023252 B CN113023252 B CN 113023252B CN 202110437648 A CN202110437648 A CN 202110437648A CN 113023252 B CN113023252 B CN 113023252B
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CN
China
Prior art keywords
chain
scraper
driven shaft
driving
shaft seat
Prior art date
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Active
Application number
CN202110437648.5A
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Chinese (zh)
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CN113023252A (en
Inventor
邹灵松
蒋裕
余燕
何翔君
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Chongqing Yushui Environmental Protection Technology Co ltd
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Chongqing Yushui Environmental Protection Technology Co ltd
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Priority to CN202110437648.5A priority Critical patent/CN113023252B/en
Publication of CN113023252A publication Critical patent/CN113023252A/en
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Publication of CN113023252B publication Critical patent/CN113023252B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
    • B65G19/18—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
    • B65G19/18—Details
    • B65G19/20—Traction chains, ropes, or cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
    • B65G19/18—Details
    • B65G19/22—Impellers, e.g. push-plates, scrapers; Guiding means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
    • B65G19/18—Details
    • B65G19/22—Impellers, e.g. push-plates, scrapers; Guiding means therefor
    • B65G19/24—Attachment of impellers to traction element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
    • B65G23/02—Belt- or chain-engaging elements
    • B65G23/04—Drums, rollers, or wheels
    • B65G23/06—Drums, rollers, or wheels with projections engaging abutments on belts or chains, e.g. sprocket wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/06—Control devices, e.g. for safety, warning or fault-correcting interrupting the drive in case of driving element breakage; Braking or stopping loose load-carriers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Control Of Conveyors (AREA)

Abstract

The invention discloses a scraper conveyor.A driving chain wheel component and a driven chain wheel component are oppositely arranged on a rack of the scraper conveyor, the two chain wheel components are sleeved with a same scraper chain, and a scraper group is detachably arranged on the scraper chain; the driving chain wheel component is rotatably arranged on the rack and is driven to rotate by the driving device, the position of the driven chain wheel component can be adjusted to adjust the tension degree of the scraper chain, a driving wheel component is arranged between an output shaft of the driving device and a driving shaft of the driving chain wheel component, and a synchronous maintaining structure and a power cutting detection device are arranged between the driving wheel component and the output shaft; and a pressure detection element is arranged between the linear telescopic mechanism and the frame or the driven shaft seat. The invention has the beneficial effects that: the scraper chain is easy to replace and maintain, power cut-off can be achieved passively when abnormity is allowed, power abnormity signals and tension abnormity states are fed back to the central control module, and safety of the scraper conveyor is improved.

Description

Scraper conveyor
Technical Field
The invention belongs to the technical field of short-distance conveying equipment for semisolid materials or granular materials, relates to a belt type conveying device, and particularly relates to a scraper conveyor.
Background
The scraper conveyor is widely applied to the transportation of semi-solid materials or particles and is more applied to mines and production lines. The scraper conveyor main body comprises a closed annular conveying groove or a closed annular conveying pipe, a closed annular scraper chain is arranged inside the conveying groove or the closed annular conveying pipe, and the scraper chain extends along the conveying groove or the conveying pipe. The scraper chain is supported by two chain wheel assemblies which are rotatably arranged, and the scraper chain is wound on the two chain wheel assemblies. One of the two chain wheel assemblies is a driving chain wheel assembly and is driven by a driving device to rotate, and the other chain wheel assembly is a driven chain wheel assembly. The rotation of the two chain wheel assemblies drives the scraper chain to rotate, so that materials are conveyed. After a long time operation, the tension of the scraper chain changes, resulting in a decrease in transportation efficiency or a fracture due to excessive tension, wear, and fatigue. If the scraper chain cracks, is locally damaged or is blocked, and the driving device continues to drive the conveying device to operate at the moment, large-area damage is caused. On the other hand, the scraper chain needs to be replaced after being worn. The scraper chain includes a chain body that acts as a driving member between the two sprocket assemblies. The chain body is located the middle part of conveyer trough or conveyer pipe, all is provided with the material backup pad on the both sides wall of conveyer trough or conveyer pipe, and the both sides of chain body are fixed respectively and are set up the scraper blade, and the scraper blade falls on the material backup pad, and when the chain rotated, the scraper blade promoted the material and moves forward. The existing scraper chain comprises an L-shaped plate, one arm of which is hinged with the front and rear link units as a part of the link unit, and the other arm of which extends laterally perpendicular to the chain body. Because the L-shaped plate not only serves as a part of the chain link unit, but also plays the role of a scraper, the whole chain needs to be disassembled for replacement when the chain is replaced, and the disassembly and the assembly are very inconvenient. In order to maintain the use state of the scraper conveyor, ensure the service life of the scraper conveyor, control the damage degree under abnormal conditions and facilitate maintenance, the structure of the existing scraper conveyor needs to be improved.
Disclosure of Invention
In view of the above, the present invention is directed to a scraper conveyor.
The technical scheme is as follows:
a scraper conveyor is characterized in that two chain wheel assemblies are oppositely arranged on a rack of the scraper conveyor, the two chain wheel assemblies are sleeved with a same scraper chain, and are respectively a driving chain wheel assembly and a driven chain wheel assembly, wherein the driving chain wheel assembly is rotatably arranged on the rack and is driven by a driving device to rotate;
the driven shaft seat is arranged on the rack in a sliding way, the driven sprocket wheel component is arranged on the driven shaft seat in a rotating way, a linear telescopic mechanism is arranged between the driven shaft seat and the rack to adjust the distance between the two sprocket wheel components, the key point is that,
the scraper chain comprises a closed annular chain body, at least two groups of scraper groups are arranged on the chain body at intervals, each scraper group comprises two L-shaped scrapers, and the two L-shaped scrapers in the same group are detachably arranged on two sides of the chain body respectively;
a driving wheel assembly is arranged between an output shaft of the driving device and a driving shaft of the driving chain wheel assembly, a synchronous holding structure is arranged between the driving wheel assembly and the output shaft, and power transmission of the output shaft is cut off when the synchronous holding structure is sheared and damaged;
a power cut-off detection device is arranged close to the synchronous holding structure and is used for detecting asynchronous rotation between the driving wheel assembly and the output shaft;
and a pressure detection element is arranged between the linear telescopic mechanism and the rack or the driven shaft seat.
As a preferred technical scheme, the scraper chain comprises a plurality of chain link units which are annularly arranged, the chain link units are hinged end to form a closed annular chain body, and two L-shaped scrapers in the same group are respectively detachably mounted on two sides of the same chain link unit;
the two arms of the L-shaped scraper are respectively a strip-shaped mounting plate and a scraper body, wherein the mounting plate is attached to the side wall of the corresponding chain link unit, any end of the mounting plate is connected with one end of the scraper body, the other end of the scraper body is perpendicular to the mounting plate and extends outwards, and the two side surfaces of the scraper body respectively face the front and back directions of the movement of the chain link unit;
and a reinforcing rib is arranged between the mounting plate and the scraper body and is positioned on the rear side surface of the scraper body in the moving direction.
As a preferred technical scheme, the chain link unit comprises two strip-shaped chain plates which are arranged oppositely in parallel;
the chain link units are respectively an outer chain link unit and an inner chain link unit, wherein the outer chain link unit and the inner chain link unit are alternately arranged and hinged end to end, two chain plates of the outer chain link unit are attached to the outer sides of the corresponding chain plates of the inner chain link unit at two ends of the outer chain link unit, the connecting ends of the four adjacent chain plates of the outer chain link unit and the inner chain link unit are provided with a same hinge shaft in a penetrating manner, a distance barrel is sleeved on the hinge shaft, and two ends of the distance barrel are respectively abutted to the inner walls of the corresponding chain plates of the inner chain link unit;
the mounting plate is just opposite to and attached to the corresponding outer side face of the chain plate of the outer chain link unit, and two ends of the mounting plate are respectively fixed on hinged shafts at two ends of the outer chain link unit.
As a preferred technical scheme, two driven shaft seat cavities are respectively formed in two side walls of the end part of the rack corresponding to the driven sprocket wheel assembly, a driven shaft seat is arranged in each driven shaft seat cavity, the driven shaft seats are respectively arranged in the corresponding driven shaft seat cavities through linear sliding mechanisms, and the linear sliding mechanisms and the linear telescopic mechanisms are both arranged along the connecting line direction of the two sprocket wheel assemblies;
a driven shaft through hole penetrates through the rack between the two driven shaft seats, two ends of the driven shaft through hole are respectively communicated with the corresponding driven shaft seat cavities, and the driven shaft through hole and the driven shaft seat cavities are internally provided with the driven chain wheel assembly;
two ends of a rotating shaft of the driven chain wheel assembly are respectively installed on the corresponding driven shaft seats through bearings;
the linear telescopic mechanisms are respectively arranged between the two driven shaft seats and the side wall of the driven shaft seat cavity close to the driving sprocket assembly;
and the pressure detection element is arranged between any one linear telescopic mechanism and the driven shaft seat.
As a preferred technical scheme, the linear telescopic mechanism is a screw nut mechanism, and comprises a tensioning screw and a tensioning nut, the tensioning nut is fixedly arranged on the wall of the corresponding driven shaft seat cavity, the tensioning screw penetrates through the tensioning nut, and the center line of the tensioning screw is coplanar with the axis of the rotating shaft of the driven chain wheel assembly;
the two ends of the tensioning screw rod are respectively provided with a movable end and a connecting end, the movable end extends out of the driven shaft seat cavity after passing through the tensioning nut, the connecting end abuts against the corresponding driven shaft seat, and the pressure detection element is arranged between the connecting end and the driven shaft seat.
As a preferred technical scheme, the connecting end is fixedly provided with a propping disc which is propped against the driven shaft seat, the outer wall of the driven shaft seat is provided with a limiting cylinder, one end of the limiting cylinder is fixedly connected with the driven shaft seat, and the other end of the limiting cylinder faces the tensioning screw and is detachably buckled with an anti-falling cover;
the tensioning screw rod connecting end freely penetrates through the anti-falling cover and then extends into the limiting cylinder, and is fixedly connected with the abutting disc so as to allow the abutting disc to rotate in the limiting cylinder;
the pressure detection element is a pressure sensor which is arranged in the corresponding limiting cylinder and clamped between the abutting disc and the driven shaft seat.
As a preferred technical scheme, the transmission wheel assembly comprises a driving wheel mounted on the output shaft, a shaft sleeve is fixedly sleeved on the output shaft, the driving wheel is sleeved on the shaft sleeve, an annular positioning shoulder protruding outwards is arranged on the outer wall of the shaft sleeve, and one side of the positioning shoulder is attached to the driving wheel;
one end of the output shaft extends out of the shaft sleeve and is connected with a limiting end cover, the limiting end cover is fixedly arranged on the end face of the output shaft, and the limiting end cover and the positioning shoulder are respectively attached to the driving wheel from two sides of the driving wheel so as to axially limit the driving wheel;
the synchronous maintaining structure is arranged between the positioning shoulder and the driving wheel.
As a preferred technical solution, the above-mentioned synchronous holding structure includes a safety pin;
a first positioning hole penetrates through the positioning shoulder in parallel to the axial direction of the positioning shoulder, a second positioning hole penetrates through the driving wheel corresponding to the first positioning hole, the second positioning hole is in opposite communication with the first positioning hole, and the safety pin penetrates through the second positioning hole and the first positioning hole.
As a preferable aspect, the power cut detection device includes an indicating member provided between the positioning shoulder and the drive wheel;
when the synchronous maintaining structure is damaged, the position of the indicating component is changed due to the asynchronous rotation of the shaft sleeve and the driving wheel, and a detecting device for detecting the position change of the indicating component is arranged corresponding to the indicating component.
As a preferred technical scheme, an indicating pin hole penetrates through the positioning shoulder in parallel to the axial direction of the positioning shoulder, a blind hole is formed in the driving wheel opposite to the indicating pin hole, the same indicating pin penetrates through the blind hole and the indicating pin hole, and the indicating pin forms the indicating component;
the blind hole extends on the surface of the driving wheel, which is attached to the positioning shoulder, to form an arc-shaped groove, the circle center line of the arc-shaped groove is collinear with the axis line of the driving wheel, and the depth of the arc-shaped groove is gradually reduced to zero from the blind hole end to the other end;
when the positioning shoulder and the driving wheel rotate relatively, the groove bottom of the arc-shaped groove pushes the indicating pin to be separated from the arc-shaped groove, and the indicating pin moves back to the driving wheel to extend out of the indicating pin hole so as to be detected by the detection device;
the detection device is a fixedly arranged travel switch, and a push rod of the travel switch extends towards the shaft sleeve so that a contact of the push rod is close to one end, back to the driving wheel, of the indicating pin hole.
Compared with the prior art, the invention has the following beneficial effects: the scraper of the scraper chain is easy to replace and maintain after being worn; the synchronous maintaining structure is arranged, so that the scraper chain can be cut off when the operation is blocked, the power transmission is interrupted, the protection of the conveyor is realized passively, and the power cut-off detection device and the pressure detection element respectively feed back a power abnormal signal and a tension abnormal state to the central control module, so that the working personnel are reminded in time, and the safety of the scraper conveyor is improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic structural view of a section of a scraper chain;
FIG. 3 is a schematic structural view of an L-shaped squeegee;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
FIG. 6 is a schematic view of the structure of the synchronization maintaining structure and the power cut-off detecting means;
FIG. 7 is a schematic structural view of the bushing;
FIG. 8 is a schematic view of the driving wheel;
FIG. 9 is a cross-sectional view C-C of FIG. 8;
FIG. 10 is a cross-sectional view taken along line D-D of FIG. 8;
FIG. 11 is a schematic workflow diagram of a protection system;
fig. 12 is a schematic structural view of a conventional scraper chain.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
As shown in fig. 1, a scraper conveyor is provided with two sprocket assemblies on its frame 100 relatively, two the last cover of sprocket assembly is equipped with same scraper chain 400, two sprocket assembly is drive sprocket assembly 200 and driven sprocket assembly 300 respectively, wherein drive sprocket assembly 200 rotates and installs on the frame 100 to by drive arrangement 800 drive rotation. The driven shaft seat 140 is arranged on the rack 100 in a sliding mode, the driven chain wheel assembly 300 is installed on the driven shaft seat 140 in a rotating mode, and a linear telescopic mechanism 600 is arranged between the driven shaft seat 140 and the rack 100 to adjust the distance between the two chain wheel assemblies.
As shown in fig. 2, the scraper chain 400 includes a plurality of link units 410 arranged annularly, the link units 410 are hinged end to form a closed annular chain body, at least two scraper groups are arranged on the chain body at intervals, each scraper group includes two L-shaped scrapers 420, and the two L-shaped scrapers 420 of the same group are respectively and detachably mounted on two sides of the same link unit 410.
As shown in fig. 3 and 4, the two arms of the L-shaped scraper 420 are respectively a strip-shaped mounting plate 421 and a scraper body 422, wherein the mounting plate 421 abuts against the corresponding side wall of the link unit 410, any one end of the mounting plate 421 is connected with one end of the scraper body 422, the other end of the scraper body 422 is perpendicular to the mounting plate 421 and extends outward, and two side surfaces of the scraper body 422 respectively face the front and back directions of the movement of the link unit 410. A reinforcing rib 423 is provided between the mounting plate 421 and the squeegee body 422, and the reinforcing rib 423 is located on the rear side surface in the moving direction of the squeegee body 422. In this way, the connection between the flight body 422 and the mounting plate 421 is reinforced, and the flight body 422 is better able to withstand the reaction resistance from the material as the flight chain moves.
The link unit 410 includes two strip-shaped chain plates 411 that are arranged in parallel and opposite to each other. The chain link unit 410 has two kinds, is outer chain link unit and inner link unit respectively, and wherein outer chain link unit and inner link unit set up in turn and end to end articulated, two link plates 411 of outer chain link unit paste and lean on at its both ends the outside of the corresponding link plate 411 of inner link unit, it is adjacent the same root articulated shaft 430 is worn to be equipped with by four link plate 411 links of outer chain link unit and inner link unit, and the cover is equipped with distance tube 440 on this articulated shaft 430, and the both ends of this distance tube 440 support respectively and lean on the inner wall of the corresponding link plate 411 of inner link unit. The mounting plate 421 faces and abuts against the outer side surface of the corresponding link plate 411 of the outer link unit, and two ends of the mounting plate 421 are respectively fixed on the hinge shafts 430 at two ends of the outer link unit.
All the scraper groups are uniformly distributed on the chain body, and at least one chain link unit 410 is arranged between any two adjacent scraper groups at intervals.
The width of the mounting plate 421 is equal to the width of the side wall of the link unit 410 so that the mounting plate 421 moves and rotates in synchronization with the corresponding link plate 411 without being blocked by a space. The width of the scraper body 422 is greater than that of the mounting plate 421 to obtain a larger material acting surface, thereby pushing more materials.
When the scraper body 422 is worn and needs to be replaced, only the worn L-shaped scraper 420 needs to be detached, and a new L-shaped scraper 420 needs to be replaced. In the whole disassembly and assembly process, the chain body still keeps complete structure and is very convenient to replace. However, as shown in fig. 12, the existing scraper chain structure has an L-shaped plate that is used as a part of the chain unit and also as a scraper, and after long-term operation, the chain is severely worn or the bent part is fatigue-broken, so that the whole chain needs to be disassembled for replacement, and the disassembly and assembly are very inconvenient. The solution of the invention overcomes this drawback.
A driving wheel assembly 900 is disposed between the output shaft 810 of the driving device 800 and the driving shaft of the driving sprocket assembly 200, a synchronization maintaining structure is disposed between the driving wheel assembly 900 and the output shaft 810, and when the synchronization maintaining structure is damaged by shearing, the power transmission of the output shaft 810 is cut off. The purpose of this design is to achieve passive protection by breaking the synchronization maintaining structure and interrupting the power input to the drive sprocket assembly 200 when the flight chain 400 is blocked from running. Adjacent to the synchronisation retention means, power cut-off detection means are provided for detecting asynchronous rotation between the drive wheel assembly 900 and the output shaft 810. A pressure detecting element 700 is installed between the linear expansion mechanism 600 and the rack 100 or the driven shaft seat 140.
As shown in fig. 1 and 5, two driven shaft housings 110 are respectively disposed on two side walls of the end portion of the frame 100 corresponding to the driven sprocket assembly 300, one driven shaft seat 140 is disposed in each driven shaft housing 110, the driven shaft seats 140 are respectively disposed in the corresponding driven shaft housings 110 through linear sliding mechanisms, and the linear sliding mechanisms and the linear telescoping mechanisms 600 are both disposed along the connecting line direction of the two sprocket assemblies.
A driven shaft through hole 120 penetrates through the rack 100 between the two driven shaft seats 140, two ends of the driven shaft through hole 120 are respectively communicated with the corresponding driven shaft seat cavity 110, and the driven sprocket assembly 300 is arranged in the driven shaft through hole 120 and the driven shaft seat cavity 110. Two ends of the rotating shaft of the driven sprocket assembly 300 are respectively mounted on the corresponding driven shaft seats 140 through bearings.
The linear expansion mechanism 600 is disposed between the two driven shaft seats 140 and the side wall of the driven shaft seat cavity 110 close to the driving sprocket assembly 200. The pressure detection element 700 is disposed between any one of the linear expansion mechanism 600 and the driven shaft seat 140.
In this embodiment, the linear expansion mechanism 600 is a screw nut mechanism, and includes a tensioning screw 610 and a tensioning nut 620, the tensioning nut 620 is fixedly disposed on the wall of the driven shaft seat cavity 110, the tensioning screw 610 penetrates through the tensioning nut 620, and a center line of the tensioning screw 610 is coplanar with a shaft axis of the driven sprocket assembly 300. Two ends of the tensioning screw 610 are respectively a movable end and a connecting end, the movable end extends out of the driven shaft seat cavity 110 after passing through the tensioning nut 620, the connecting end abuts against the corresponding driven shaft seat 140, and the pressure detection element 700 is arranged between the connecting end and the driven shaft seat 140.
In order to effectively transmit the top tension of the screw-nut mechanism, the connecting end is fixedly provided with a leaning disc 630, the leaning disc 630 is leaned against the driven shaft seat 140, the outer wall of the driven shaft seat 140 is provided with a limiting cylinder 500, one end of the limiting cylinder 500 is fixedly connected with the driven shaft seat 140, and the other end of the limiting cylinder 500 faces the tensioning screw 610 and is detachably covered with an anti-falling cover 510.
The connecting end of the tension screw 610 freely passes through the anti-dropping cover 510 and then extends into the limiting cylinder 500, and is fixedly connected with the abutting disc 630 so as to allow the abutting disc 630 to rotate in the limiting cylinder 500. In this way, when the tensioning screw 610 is rotated, the driven shaft seat 140 can be driven to approach or separate from the tensioning nut 620 synchronously due to the abutting disc 630 being limited in the limiting cylinder 500.
The pressure detecting element 700 is a pressure sensor, the pressure sensor is disposed in the corresponding limiting cylinder 500 and is clamped between the abutting disc 630 and the driven shaft seat 140, and a measuring surface of the pressure sensor faces the abutting disc 630 or the driven shaft seat 140.
In this embodiment, as shown in fig. 1, the rotation axis of the driven sprocket assembly 300 is in a horizontal direction, and one of the linear sliding mechanisms is disposed between the top and bottom of the driven shaft seat 140 and the driven shaft seat cavity 110. The linear sliding mechanism comprises a guide rail 130, the guide rail 130 is parallel to the axial direction of the tensioning screw 610, the top and the bottom of the driven shaft seat 140 are respectively provided with a sliding groove, and the sliding grooves are sleeved on the corresponding guide rail 130 in a sliding manner. The chute is not shown in the figures.
Referring to fig. 6, the driving wheel assembly 900 includes a driving wheel 910 mounted on the output shaft 810, the output shaft 810 is sleeved with a sleeve 820, the sleeve 820 is sleeved with the driving wheel 910, the outer wall of the sleeve 820 is provided with an annular positioning shoulder 821 protruding outwards, and one side of the positioning shoulder 821 abuts against the driving wheel 910. One end of the output shaft 810 extends out of the shaft sleeve 820 and is connected with a limiting end cover 830, the limiting end cover 830 is fixedly arranged on the end surface of the output shaft 810, and the limiting end cover 830 and the positioning shoulder 821 are respectively abutted against the driving wheel 910 from two sides of the driving wheel 910 to limit the driving wheel 910 axially.
The timing maintaining structure is provided between the positioning shoulder 821 and the driving wheel 910.
As shown in fig. 6, the synchronization maintaining structure includes a safety pin 840. As shown in fig. 7 and 8, a first positioning hole 822 is formed through the positioning shoulder 821 in parallel to the axial direction thereof, a second positioning hole 911 is formed through the driving wheel 910 corresponding to the first positioning hole 822, the second positioning hole 911 is in direct contact with the first positioning hole 822, and the safety pin 840 is formed through the second positioning hole 911 and the first positioning hole 822.
The performance requirements of the shear pin 840 are primarily its shear strength. According to practical testing, when the device driven by the driving wheel 910 is jammed and may be damaged, the shearing force of the safety pin 840 corresponding to the torsion between the driving wheel 910 and the shaft sleeve 820 is determined as the critical shearing force. The critical shear strength of the shear pin 840 is determined from the critical shear force. For example, the shear failure strength of the shear pin 840 may be equal to or slightly less than the critical shear strength by selecting a suitable material for the shear pin 840. In addition, the center of the shear pin 840 may be designed as a neck section 841, the shear failure strength of the neck section 841 is equal to or slightly less than the critical shear strength, and the neck section 841 is located at the connection point of the second pilot hole 911 and the first pilot hole 822 after the installation is completed, as shown in fig. 2. Thus, when the resistance of the device driven by the driving wheel 910 is too large, the shear pin 840 is sheared, the sleeve 820 no longer drives the driving wheel 910 to rotate synchronously, and the output shaft 810 idles, thereby passively protecting the driven device.
The safety pin 840 may be threadably engaged with the first and second positioning holes 822, 911, or may be positioned by a threaded positioning pin disposed on the positioning shoulder 821 as in the present embodiment. A threaded dowel pin is radially disposed along and threadably engaged with the locating shoulder 821, the inner end of the threaded dowel pin extending into the first locating hole 822 and pressing against the shear pin 840 to fix its position.
The power cut-off detection means includes an indicating member provided between the positioning shoulder 821 and the drive wheel 910. When the synchronous maintaining structure is broken, the shaft sleeve 820 and the driving wheel 910 rotate asynchronously to change the position of the indicating member, and a detecting device 860 for detecting the position change is provided corresponding to the indicating member.
Specifically, as shown in fig. 6 to 10, an indication pin hole 823 penetrates through the positioning shoulder 821 in parallel to the axial direction thereof, a blind hole 912 is opened on the driving wheel 910 opposite to the indication pin hole 823, the same indication pin 850 penetrates through the blind hole 912 and the indication pin hole 823, and the indication pin 850 forms the indication member. The blind hole 912 extends on the surface of the driving wheel 910, which is abutted to the positioning shoulder 821, to form an arc-shaped groove 913, the center line of the arc-shaped groove 913 is collinear with the axis of the driving wheel 910, and the depth of the arc-shaped groove 913 gradually decreases from the end of the blind hole 912 to the other end to zero. When the positioning shoulder 821 and the driving wheel 910 rotate relatively, the groove bottom of the arc-shaped groove 913 pushes the indicating pin 850 to be out of the arc-shaped groove 913, and the indicating pin moves away from the driving wheel 910 to extend out of the indicating pin hole 823, so as to be detected by the detecting device 860.
The detecting device 860 is a fixed travel switch, and a push rod of the travel switch extends towards the shaft sleeve 820 so that a push rod contact 861 of the travel switch is close to one end of the indicating pin hole 823, which faces away from the driving wheel 910.
In order to prevent damage caused by the indicator pin 850 flying out of the indicator pin bore 823 when the safety pin 840 is sheared, as shown in fig. 6 and 7, the indicator pin bore 823 is a stepped bore, and a large diameter end of the indicator pin bore 823 faces the blind bore 912. The outer diameter of the indicating pin 850 is equal to the smaller inner diameter of the indicating pin hole 823, one end of the indicating pin 850 corresponding to the arc-shaped groove 913 is fixedly provided with an anti-falling head, and the outer diameter of the anti-falling head is larger than the smaller inner diameter of the indicating pin hole 823, so that the indicating pin 850 can be pushed by the arc-shaped groove 913 to extend out of the indicating pin hole 823 without flying out. The surface of the anti-drop head facing the groove bottom of the arc-shaped groove 913 is a convex curved surface, so that when the driving wheel 910 rotates, the sliding fit between the arc-shaped groove 913 and the anti-drop head is smoother.
The driving device 800 comprises a driving motor, the driving motor is in transmission connection with a speed reducer, and an output shaft of the speed reducer is an output shaft 810 of the driving device 800.
As shown in fig. 11, the scraper conveyor of the present invention is further provided with a central control module and an alarm, and the central control module, the alarm, the power cutoff detection device and the pressure detection element 700 together form a protection system.
The signal output end of the power cut-off detection device transmits a power cut-off signal to the power signal input end of the central control module, the pressure detection element 700 transmits a measured pressure signal to the pressure signal input end of the central control module, and the central control module controls the driving device 800 and the alarm.
Storing characteristic pressure values in the central control module, each of which is a low limiting pressure value F 1 Upper limit pressure value F 2 Safety pressure value F 3 . Pressure ofThe pressure value measured by the sensing element 700 is f. When F is present 1 <f<F 2 Meanwhile, the central control module judges that the tension state of the scraper chain 400 is normal; when f is<F 1 Or F 2 <f<F 3 When the alarm is started, the central control module controls the alarm to give an alarm; when f is>F 3 At this time, the central control module directly turns off the driving device 800.
When the indicating pin 850 protrudes out of the indicating pin hole 823 and the detecting device 860 detects this change in position, the detecting device 860 transmits a power cut-off signal to the central control module, which directly turns off the driving device 800.
The tension early warning of the conveyor, the power cut-off under abnormal conditions and the shutdown of the driving device 800 are realized through the protection system, and the protection of the conveyor is effectively realized.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and that those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims (4)

1. A scraper conveyor is characterized in that two chain wheel assemblies are oppositely arranged on a rack (100) of the scraper conveyor, the two chain wheel assemblies are sleeved with a same scraper chain (400), and are respectively a driving chain wheel assembly (200) and a driven chain wheel assembly (300), wherein the driving chain wheel assembly (200) is rotatably arranged on the rack (100) and is driven to rotate by a driving device (800);
frame (100) go up the slip and be provided with driven shaft seat (140), rotate on this driven shaft seat (140) and install driven sprocket subassembly (300), this driven shaft seat (140) with be provided with sharp telescopic machanism (600) between frame (100), in order to adjust two distance between the sprocket subassembly, its characterized in that:
the scraper chain (400) comprises a closed annular chain body, at least two groups of scraper groups are arranged on the chain body at intervals, each scraper group comprises two L-shaped scrapers (420), and the two L-shaped scrapers (420) in the same group are respectively and detachably arranged on two sides of the chain body;
a transmission wheel assembly (900) is arranged between an output shaft (810) of the driving device (800) and a driving shaft of the driving chain wheel assembly (200), a synchronous maintaining structure is arranged between the transmission wheel assembly (900) and the output shaft (810), and when the synchronous maintaining structure is sheared and damaged, the power transmission of the output shaft (810) is cut off;
when the scraper chain (400) is blocked from running, the synchronous maintaining structure is subjected to shearing failure, and the power input of the driving sprocket assembly (200) is interrupted, so that passive protection is realized;
a power cut-off detection means is provided adjacent the synchronising maintaining structure for detecting non-synchronised rotation between the drive wheel assembly (900) and the output shaft (810);
a pressure detection element (700) is arranged between the linear telescopic mechanism (600) and the frame (100) or the driven shaft seat (140);
two driven shaft seat cavities (110) are respectively formed in two side walls of the end part of the rack (100) corresponding to the driven chain wheel assembly (300), a driven shaft seat (140) is arranged in each driven shaft seat cavity (110), the driven shaft seats (140) are respectively arranged in the corresponding driven shaft seat cavities (110) through linear sliding mechanisms, and the linear sliding mechanisms and the linear telescopic mechanisms (600) are both arranged along the connecting line direction of the two chain wheel assemblies;
a driven shaft through hole (120) penetrates through the rack (100) between the two driven shaft seats (140), two ends of the driven shaft through hole (120) are respectively communicated with the corresponding driven shaft seat cavities (110), and the driven shaft through hole (120) and the driven shaft seat cavities (110) are internally provided with driven chain wheel assemblies (300);
two ends of a rotating shaft of the driven chain wheel assembly (300) are respectively installed on the corresponding driven shaft seats (140) through bearings;
the linear telescopic mechanism (600) is arranged between the two driven shaft seats (140) and the side wall of the driven shaft seat cavity (110) close to the driving sprocket assembly (200);
the pressure detection element (700) is arranged between any one linear telescopic mechanism (600) and the driven shaft seat (140);
the linear telescopic mechanism (600) is a screw-nut mechanism and comprises a tensioning screw (610) and a tensioning nut (620), the tensioning nut (620) is fixedly arranged on the wall of the corresponding driven shaft seat cavity (110), the tensioning screw (610) penetrates through the tensioning nut (620), and the central line of the tensioning screw (610) is coplanar with the axial line of the rotating shaft of the driven chain wheel assembly (300);
two ends of the tensioning screw rod (610) are respectively a movable end and a connecting end, the movable end extends out of the driven shaft seat cavity (110) after passing through the tensioning nut (620), the connecting end abuts against the corresponding driven shaft seat (140), and the pressure detection element (700) is arranged between the connecting end and the driven shaft seat (140);
the connecting end is fixedly provided with a leaning disc (630), the leaning disc (630) leans against the driven shaft seat (140), the outer wall of the driven shaft seat (140) is provided with a limiting cylinder (500), one end of the limiting cylinder (500) is fixedly connected with the driven shaft seat (140), the other end of the limiting cylinder (500) faces the tensioning screw rod (610) and is detachably buckled and covered with an anti-falling cover (510);
the connecting end of the tensioning screw rod (610) freely passes through the anti-dropping cover (510) and then extends into the limiting cylinder (500) and is fixedly connected with the abutting disc (630) so as to allow the abutting disc (630) to rotate in the limiting cylinder (500);
the pressure detection element (700) is a pressure sensor which is arranged in the corresponding limiting cylinder (500) and clamped between the abutting disc (630) and the driven shaft seat (140);
the transmission wheel assembly (900) comprises a driving wheel (910) arranged on the output shaft (810), a shaft sleeve (820) is fixedly sleeved on the output shaft (810), the driving wheel (910) is sleeved on the shaft sleeve (820), an annular positioning shoulder (821) protruding outwards is arranged on the outer wall of the shaft sleeve (820), and one side of the positioning shoulder (821) is abutted against the driving wheel (910);
one end of the output shaft (810) extends out of the shaft sleeve (820) and then is connected with a limiting end cover (830), the limiting end cover (830) is fixedly arranged on the end face of the output shaft (810), and the limiting end cover (830) and the positioning shoulder (821) respectively abut against the driving wheel (910) from two sides of the driving wheel (910) so as to axially limit the driving wheel (910);
the synchronous maintaining structure is arranged between the positioning shoulder (821) and the driving wheel (910);
the power cut-off detection means comprises an indication member provided between the positioning shoulder (821) and the drive wheel (910);
when the synchronous maintaining structure is broken, the shaft sleeve (820) and the driving wheel (910) rotate asynchronously so that the position of the indicating component is changed, and a detecting device (860) for detecting the position change of the indicating component is arranged corresponding to the indicating component;
an indication pin hole (823) penetrates through the positioning shoulder (821) in parallel to the axial direction of the positioning shoulder, a blind hole (912) is formed in the driving wheel (910) opposite to the indication pin hole (823), the same indication pin (850) penetrates through the blind hole (912) and the indication pin hole (823), and the indication pin (850) forms the indication part;
the blind hole (912) extends on the surface of the driving wheel (910) abutting against the positioning shoulder (821) to form an arc-shaped groove (913), the circle center line of the arc-shaped groove (913) is collinear with the axis of the driving wheel (910), and the depth of the arc-shaped groove (913) is gradually reduced to zero from one end of the blind hole (912) to the other end;
when the positioning shoulder (821) and the driving wheel (910) rotate relatively, the groove bottom of the arc-shaped groove (913) pushes the indicating pin (850) to be out of the arc-shaped groove (913), and moves back to the driving wheel (910) to extend out of the indicating pin hole (823) so as to be detected by the detecting device (860);
the detection device (860) is a fixed travel switch, and a push rod of the travel switch extends towards the shaft sleeve (820) so that a push rod contact (861) of the travel switch is close to one end, facing away from the driving wheel (910), of the indication pin hole (823);
the scraper conveyor also comprises a central control module and an alarm, wherein the central control module, the alarm, a power cut-off detection device and a pressure detection element (700) jointly form a protection system;
the signal output end of the power cut-off detection device transmits a power cut-off signal to the power signal input end of the central control module, the pressure detection element (700) transmits a detected pressure signal to the pressure signal input end of the central control module, and the central control module controls the driving device (800) and the alarm;
storing in the central control module a characteristic pressure value, respectively a low limiting pressure value F 1 Upper limit pressure value F 2 Safety pressure value F 3 (ii) a The pressure value measured by the pressure detection element (700) is F when F is 1 <f<F 2 When the tension state of the scraper chain (400) is normal, the central control module judges that the tension state of the scraper chain is normal; when f is<F 1 Or F 2 <f<F 3 When the alarm is started, the central control module controls the alarm to give an alarm; when f is>F 3 When the control module is started, the central control module directly closes the driving device (800);
when the indicating pin (850) extends out of the indicating pin hole (823) and the detecting device (860) detects the position change, the detecting device (860) transmits a power cut-off signal to the central control module, and the central control module directly closes the driving device (800).
2. The scraper conveyor of claim 1, wherein: the scraper chain (400) comprises a plurality of chain link units (410) which are annularly arranged, the chain link units (410) are hinged end to form a closed annular chain body, and two L-shaped scrapers (420) in the same group are respectively and detachably mounted on two sides of the same chain link unit (410);
two arms of the L-shaped scraper (420) are respectively a strip-shaped mounting plate (421) and a scraper body (422), wherein the mounting plate (421) is attached to the side wall of the corresponding chain unit (410), any one end of the mounting plate (421) is connected with one end of the scraper body (422), the other end of the scraper body (422) is perpendicular to the mounting plate (421) and extends outwards, and two side surfaces of the scraper body (422) respectively face to the front and back directions of the movement of the chain unit (410);
and a reinforcing rib (423) is arranged between the mounting plate (421) and the scraper body (422), and the reinforcing rib (423) is positioned on the rear side surface of the scraper body (422) in the moving direction.
3. The scraper conveyor of claim 2, wherein: the chain link unit (410) comprises two strip-shaped chain plates (411) which are arranged oppositely in parallel;
the chain link units (410) are two types, namely outer chain link units and inner chain link units, wherein the outer chain link units and the inner chain link units are alternately arranged and hinged end to end, two chain plates (411) of the outer chain link units are attached to the outer sides of the corresponding chain plates (411) of the inner chain link units at the two ends of the outer chain link units, the connecting ends of the four adjacent chain plates (411) of the outer chain link units and the inner chain link units are provided with a same hinge shaft (430) in a penetrating mode, distance cylinders (440) are sleeved on the hinge shaft (430), and the two ends of the distance cylinders (440) are respectively abutted to the inner walls of the corresponding chain plates (411) of the inner chain link units;
the mounting plate (421) is opposite to and attached to the outer side face of the corresponding chain plate (411) of the outer chain link unit, and two ends of the mounting plate (421) are respectively fixed on hinge shafts (430) at two ends of the outer chain link unit.
4. The scraper conveyor of claim 1, wherein: the synchronization retention structure includes a shear pin (840);
a first positioning hole (822) penetrates through the positioning shoulder (821) in parallel to the axial direction of the positioning shoulder, a second positioning hole (911) penetrates through the driving wheel (910) corresponding to the first positioning hole (822), the second positioning hole (911) is in opposite communication with the first positioning hole (822), and the safety pin (840) penetrates through the second positioning hole (911) and the first positioning hole (822).
CN202110437648.5A 2021-04-22 2021-04-22 Scraper conveyor Active CN113023252B (en)

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